PhysicsMathematicians offer tip-offs to LAPD Two new equations describe how crime hotspots form – and what police can do about them 51¶¯Âþ
TechnologyHow touch screens could shrug off shoulder surfers They make it easier for onlookers to spy pass codes, but touch screens' flexibility could be the source of easy-to-use, secure alternatives to PINs 51¶¯Âþ